Electric vibrator.



W.'C. BRINTUN, in!

ELECTRIC VHHMTUR. I APPLICAHIJH men DiTEI 24. mm

1 ,251,88()u Patented Jan. 29, 1918.

.UNIIED STATES T OFFICE.

WILLIAM C. BRINTON, JR., OF KENNETT SQUARE, PENNSYLVANIA, ASSIGNOR TPHILIPS-BEINTON COMPANY, OF KENNETT SQUARE, PENNSYLVANIA, A CORPO-RATION OF PENNSYLVANIA.

ELnc'r'aIo VIBRATOR.

1 254 880 Specification. of. Letters Patent. Patented Jan, 29, 191B,

* Application filed October 21, 1916. Serial No. 127,333, "To all whomit may concern: Will affect i only inappreciably, thereby Be it knownthat I, WILLIAM Bnls'rou, dispensing with the necessity of ad ustingJ12, a citizen of the United States, residing at the contact pin tocompensate .for wear. Kennett Square, county of Chester, and. Thisobject has been achieved wlthout pro- St'ate oflennsylvania,haveinvented a new riding new parts, but by reconstructing the anduseful Improvement in Electric Vibraold parts and giving them, Withinclearly tors, of which the following is a full, clear, worked out hunts,certaln shapes and ab and exact description, reference being had soluteand relative proportions winch will to the, accompanying drawings, whichform be more fully understood by, reference to a part of thisspecification. the accompanying draw ngs, in Wh1ch I As is well known,in an ordinary vibrator, Figure 1 1s a plan view of the vibratingcomposed of a fixed contact pin, an electroarmature, with the core ofthe magnet 1n magnet comprising a core and winding, and dotted hues.Fig. 2 is an. elevation 'of the an armature vi'bratable between the corecomplete vibrator. Fig. 3 is a section on and the contact pin, it isessential that the the line 3-3-of Fig. 2. distance traversed by thearmature should The U-shaped member In: is secured to an besubstantially fixed, otherwise the curinsulated base One upright arm 0of rent consumption will vary within wide said member forms the core ofthe magnet. limits. The contact pin is, therefore, iui- (Z is theWinding for the core. To the/outtially adjusted so that its contactsurface will turned end of the other arn'i Z; of said membe a fixeddistance from the contact face of her is secured the armature, In thebracket j the core. Itis also well known that the m is screw-threaded acontact pin 76 ar-"' contact surfaces are subjected to 'considerrangedopposite a-contact pin i secured to able Wear, thereby graduallyincreasin the the free end of the armature. The armature distancebetween contact surfaces and incomprises a thin metal plate 6 secured tocreasing the range of movement of the 'armathe arm It by being clamped,by means of a 80 turc. ,This results inn-pronounced variation screw 7,between the arm 6 and a transin current consumption. To compensate forrersely extending channelshaped strip it; this and restore the initialconditions, the and two thin metal plates f arranged on op contact pinis made adjustable. posite sides of the plate 6 and secured there- Bymore or less frequent adjustments of to by means of rivets the contactpin, the desired current con- The core of the magnet has the followingsuniption may be in a measure restored to essential characteristic: itis of approxinormal; but it is obvious that=with many matcly apronouncedly oblong shape in forms otniachincs in which vibrators arecross-section, Width being several-times employed, the operator is notaware of the greatcr than its thickness. the preferred ranecessity ofadjusting the'contact pin on tio being about t to 1. By so shaping thecarelessly falls to do so, with the result that core, it. is possible tosupersaturatc the magthe variation in current consumption benet. whichis of importance. comes serious, resulting in a greatly de- The plate 6of the armature is very thin, creased etficiency in the operation of thebut isof spring metal" so that its inherent machine of which thevibrator is a governelasticity maintains'ithe armature normally ingpart. in mechanical and electrical connection with Even Where withcareful supervision the the contact 70. Theemp'loyment of an incontactmember is frequently adjusted, the elastic armature operated by aseparate I differential Wear to Which the fixed contact spring should-beavoided. Theplates f of and the movable contact are subjected afthearmature pre frrably overlap the side fccts the alinement of the twocontacts so edges of the plate e, but in any cventthe as to makeimpossible a restoration of the width of the armature should not be lesson nal conditions. I than approximately the width of the core of he obect of my Invention is to provide the magnet. The provision of arelatively 1.05

I will not a a vibrator wherein a substantial variation 1n the ran e ofmovement of the armature ect the current consumption or wide core and a.correspondingly wine armature Is an essential feature of the inventlon.Another Important feature of the armature is that it should he ofrelatively short length. It has been found that if the length of theernmtnre (memmrinp from the axis of screw g to lhe center of the pin 9')substantially exceeds twice the width oi the armature, the desiredresults are not secured. The )rcllerrcd ratio of lenglh to width isabout to 5.

It has been found that by adjusting the contact. pin so as to vary thespace traw creed by the contact pin oi the armature approximately from aminimum of .015 of an inch to a maximum of .llfiU of an inch, there isno appreciable variation in the current consumption or the variations isso slight as to be negligible.

The substantial uniformity of current consumption with a range ofmovement of the armature exceeding that produced by ordinary wear afterlong usage achieves the new result of dispensing with the necessity ofadjusting the lined contact and, therefore, accomplishes a result whichis new in kind and not merely an improvement in degree.

While a condenser is employed, in the well known way, in connection withthe vibrator, the same forms no part of m invention and is, therefore,not illustrate Having now what I claim and desireto protect by LettorsPatent is:- v

1. In a vibrator, the combination with a magnet the width of the core ofwhich is several times its thickness, of an inherently elasticvibrate-hie armature plate in proximity to one end of the core and whoselcn hwise extension is transverse to the width of the core, a contactmember er ricd by the armature plate, and a second contact memberagainst which the first'contact member is held by the inherentresiliencyof the armature plate when the magnet. is denerg ized, thewidth of the armature plate being not less than approximetel the widthof thecore.

2. I1 a vibratonthe combination with a magnet the width of the core ofwhich is fully described my invention,

several times its thickness,

several limes its thickness, of a. support electri ally connected withthe core, an ninuttnre composed of an inl'ierently elastic lat plat-cextending in proximity to one end of the core, means confining one co lof the plele flat against its support, it contact memher carried by theplate, and a secondmentact member against which the first con tactn'ien'iber is held. by the inherent resili' ency of the arnmture platewhen the mag net is decnergizcd, the width of the armature plate beingnot less than approximately the width of the core. I

3. In a vibrator, the con'ibination with a magnet the width of the coreof which is several times its thickness, of an inherently elasticvihratal'ile ari'natnre ity lo one end of the core and whose lengthwiseextension is transverse to the width of the core, a contact membercarried by the armature plate, and a second contact 'menn her againstwhich the first contact men'iber is held by the inherent resiliency oithe armature plate when the magnet is deencr gized, the width of thearmature plate be ing not less than approximately the width of the coreand the length of the irmetnre plate between its fixed support and itscontact member not substantially exceeding twice its'width.

4. Inn vibrator, the combination with a magnet the width of. the coreofwhich is of an a l'mature support electrically connectedwith the core,a thininherently elastic flat 'strip secured flat agaipst its support,flat thin strips secured ,to opposite sides of the first strip beyondthe latters support, the armature thus formed extending in proximity tothe core of the magnet, and two contacts one of which is carried by thearmature and is held against the other contact by the inherentresiliency of the inner strip when the magnet is deenergized Intestimony of which invention, I have hereunto set my hand, atPhiladelphia, Penna., on'this 13th day of October, 1916. WILLIAM C.BRINTON, JR.

plate in proxim v

